Add the mayonnaise, eggs, mustard, Old Bay, and lemon juice to a large mixing bowl. Stir everything together until evenly combined.
1/2 cup mayonnaise, 1 large egg, 1 tsp Dijon mustard, 1 1/2 tsp Old Bay seasoning, 1 tbsp lemon juice
Add the crab and bread crumbs to the bowl, stirring everything together again until evenly combined.
16 oz lump crab meat, 2/3 cup plain panko bread crumbs
Roll the mixture into 1" balls (roughly 1 1/2 tbsp mixture) and transfer them to a parchment paper lined baking sheet. Repeat until all the meat mixture has been used. Freeze, flat, for 10-15 minutes.
While the balls are freezing add the mustard sauce ingredients to a small bowl. Whisk together to combine and then refrigerate to chill.
1/2 cup mayonnaise, 2 tbsp Dijon mustard, 1 tsp granulated garlic, 1 tsp lemon juice, pinch salt
Spread the bread crumbs out on a shallow plate. Remove the balls from the freezer and roll them in the bread crumbs until coated completely. Reshape into balls, as needed, then return them to the parchment paper lined baking sheet. Freeze for another 15-20 minutes.
1 cup plain fine bread crumbs
Fry the balls in hot oil, working in batches of 5-6, and turning as needed until they're golden brown and crispy. Using a slotted spoon transfer the crispy crab balls to a paper towel lined plate to drain off excess oil.
canola oil
Serve warm with chilled mustard sauce for dipping.